Dust-collector for mills



(No Model.) 2 Sheets-Sheet 1.

O. O. MOOK.

r DUST COLLECTOR FOR MILLS.

No. 309,078. Patented Dec. 9, 1884.

2 Sheets-Sheet 2 (No Model.)

O. 0. MOOK.

DUST COLLECTOR FOR MILLS.

Patented Dec. 9, 1884.

llnu'rnn STATES PATIENT @rrrcn.

CHARLES O. MOOK, OF JACKSON, MICHIGAN.

DUST-COLLECTOR FOR MILLS.

EPECIPICATIOIQ forming part Of Letters Patent NO. 309,078, dated December 9, 188%.

Application filed June 20, 1884. (No model.)

To (2% whom it may 0072/0677 Be it known that I, CHARLES 0. Moon, a citizen of the United States, residing at J ackson, in the county of Jackson and State of Michigamhave invented certain new and use ful Improvements in Dust-Oollectors for Mills; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying draw= ings, and to the letters and figures of reference marked thereon, which form a part of this specification.

This invention relates to that class of dust collectors for flouring and other mills in which the dust-laden air is conducted from the separate machines or apartments of the mill to a dust-collecting chamber,where the air is sifted or freed from dust and permitted to escape.

My invention is applicable to all classes of mills where it is desired to arrest or collect lecting chamber embodying my features not shown in Fig. 1. Fig. dis alongitudinal section taken on-line 3 3 of Fig. 3. Fig. 5 illustrates in elevation and section a detail of the blast-regulating device.

In the several viewsthe same reference-letters are used to indicate corresponding parts.

The casing A is a rigid structure,whieh may be located in any convenient place-as, for in stance, it may form a cupola at the top of a mill, or be an independent structure located adjacent to a mill.

Arranged centrally at the top of the casing A, and forming apart thereof, is a ventilatingchamber, A, the side walls of which are provided with ventilators a, (shown in Figs. 1 and 3,) and across each of these ventilators is stretched a piece of reticulated cloth, a, such as is commonly used in devices of this character.

Interposed between the ventilating-chamber A and the main or dust chamber a of the collector is a hinged frame, 13, also clothed with reticulated cloth I), and held normally in a horizontal position by a bolt, b,or other equivalent means. The walls of the casing A are provided with ventilators a similar to but proportionately smaller than the ventilators a described in connection with the ventilating-chamber A, and these ventilators a are also clothed with reticulated cloth. a Valves or gates O are secured in proximity to these ventilators a, and adapted to be moved over or away from the ventilators,to either prevent or permit of the passage of air-currents through them. Ihavein the drawings illustrated said gates as mounted to slide in ways or guides 0; but it will be understood that the same object would be accomplished if they were secured by hinges at one edge or by a pivot-bolt, it only being essential that they be adapted to be so moved as to cover or uncover the ventilating-openings,so that air may escape through them or not, as circumstances may require.

At a suitable distance below the top of the dust-chamber a are dischargeopenings D, or nozzles, as I shall call them, formed by inclined boards (Z, arranged in pairs, as shown; and to the inclined sides (I of these nozzles are adj ustably secured slide-boards D, adapted to be moved upward to project beyond the mouth of the nozzle and decrease the width of the myself to this specific construction, as it is evi- 9 dent that the slide-boards may be adjusted and held by any of the many well-known mechanical devices used for similar purposes.

The floor E of the dust-chamber may be made l'lopper-shaped, as indicated in Fig. 1,

. lows: The mill to which said collector is to be applied is provided at suitable points with the usual apparatus such as exhaust fans and pipes F-to collect the dust or refuse and conduct it to a common receptacle. I In using my dust-collector these pipes F discharge the dustladen air-current upward through the nozzles D into the dust-chamber a, where, as the current is less confined, a greater part of the dust will escape from the upward current and fall below the nozzles. The lighter particles of dust will, however, be carried upward until arrested by the reticulated cloth I) of the hinged frame 13. \Vhere the air-current is too strong this fine dust will be pressed against the cloth of the frameB until, eventually, the accumulation of fine dust upon the cloth will be so great as to prevent the passage of air. To overcome this objection Ihave provided the sides of the dust-chamber with cloth-covered ventilators c through which a portion of the air-current can pass, one or more of the gates 0 having been first properly adjusted.

I have found that a portion of the very fine particles of dust will pass through the cloth on frame. B into the ventilating-chamber, and to prevent the escape of this dust into the open air I have clothed the ventilators awith reticulated cloth, as shown. As thereis a free circulation of air from the exterior of the building through this ventilating-chamber, the fine dust will not be apt to lodge upon the cloths a in sufficient quantities to prevent the escape of air from the dust-chamber. This ventilating-chamber may be cleared of dust from time to time, as necessity requires, by withdrawing the bolt 1), which sustains the hinged frame B, and permitting the frame to swing down on its hinges and the dust to fall into the dustchamber, it being necessary, of course, during this operation to stop the fans in the mill, so

that there will be no air-current to carry the dust against the cloths.

In Fig. 3 I have illustrated a modification of my dust-collector, devised with special reference to the requirements of wood-working factories.

G G are screens of wire-cloth, arranged across the nozzles D below their dischargeopenings, to prevent shavings and the like from being carried up into the dust-room. I prefer to mount below these screens horizontal shafts H, carrying one or moreradial arms, H, provided at their outer ends with brushes h, which upon the revolution of the shafts sweep the under sides of the screens G and remove such particles as are too large to pass through the screens; but these shafts and brushes may be dispensed with. To avoid danger from fire,the bearings h, in which these shafts H are journaled, are mounted at the exterior of the casing A, as are also the pulleys or gear-wheels which connect the shafts with the source of power. I have shown these bearings and pulleys exposed to the atmosphere; but it will be understood thatin practice they will be protected by suitable housings. The portion of the interior of the casingA below the screens G forms a shavings-room, J, which communicates by means of a sliding door, '5, with one side of a fuelroom, I, at the other side of which is a similar sliding door, t, to afford communication with the furnace-room, or with a duct leading to said furnace-room. Upon closing the door z" and opening the door 7; the blast from the pipes F will carry shavings into the fuelroom I, and upon closing said door 'i and opening the door t" the shavings may be taken fromthe room I as required.

It will be observed that while a dust-collector embodying these modifications is especially adapted for use in connection with woodworking factories, they would in no wise detract from its usefulness as a flour-duster.

' Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. A dust-collector for mills,consisting, substantially as before set forth, of a dust-chamber, nozzles adapted to discharge upwardly into said chamber, a ventilatingchamber surmounting the dust chamber and having cloth-covered ventilating openings, and a hinged cloth-covered frame interposed be tween the dust and ventilating chambers.

2. The combination, substantially as before terposed between the dust and ventilating chambers, the nozzles adapted to discharge upwardly into the dust-chamber, and the'adjustable slide-boards mounted upon the inclined sides of the nozzles.

3. The combination, substantially as before set forth, of the dust-chamber, the described ventilating-chamber, the hinged cloth-covered frame interposed between the dust and ventilating chambers, the nozzles adapted to discharge upwardlyinto the dust-chamber, and means, substantially such as described, for conducting the dust from the dust-chamber.

4. A dust-collector embodying the following parts in combination: a dust-chamberprovided with an opening or openings for the passage of 'air, a pipe or conduit leading from the air-forcing apparatus of a mill to the interior of the. dust-chamber, reticulated cloth interposed between the discharge end of said pipe or conduit and the exit-openings of the dust-chamber, and wire screen secured near the discharge end of the pipe or conduit.

5. The combination, substantially as before set forth, of the dust-chamber provided with justable gate or gates for closing one or more of said openings, the nozzles adapted to discharge upwardly into the dust-chamber, and the wire screens secured across said nozzles near their discharge-openings.

6. The combination, with the dust-chainber, the nozzles, and the screens, arranged as described, of the brushes secured below the screens, and adapted to sweep the under surface thereof.

7-. The combination, with the dust-chamber, the nozzles, and the screens, all arranged as described, of the horizontal shafts, the brushes mounted thereon, and mechanical de 

